There's little worse than getting a new piece of gear and
having it fail on you.It's especially
bad if it's a high-end lens.But that's
just what's happened to some Sigma lens owners.

According to the company, there are autofocus details in
certain lenses that could greatly impair their use.But Sigma is owning up to the error and
offering a modification service to customers with the defective lenses - free
of charge.

If you've got a Sigma lens that matches the serials listed
below, you can contact Sigma directly to get the problem taken care of.If you're living in the US, the number is
(631)585-1144.If you're outside the
states, you can visit the website to find a list of Sigma service
centers.